/**
 * Copyright (C) 2009 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package c9;

import java.util.List;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Arrays;

public class Library {
    private final List<Book> books;

    public Library(List<Book> books) {
        this.books = Collections.unmodifiableList(new ArrayList<Book>(books));
    }

    public List<Book> getBooks() {
        return books;
    }

  public static void main(String[] args) {
    Book book = new Book();
    book.setTitle("Dependency Injection");

    Library library = new Library(Arrays.asList(book));

    library.getBooks().get(0).setTitle("The Tempest");		//mutates Library
    
  }
}
